| abstract |
Catalysts for treating acid and halogen gases and the production methods thereof. The acid and halogen gases include, such as, HCl, HF, HBr, HI, F2, Cl2, Br2, I2, ClF3, PH3, PCl3, PCl5, POCl3, P2O5, AsH3, SiH4, SiF4, SiCl4, SiHCl3, SiH2Cl2, BF3, BCl3, GeCl4, GeH4, NO, NO2, SO2, SO3 and SF6. The catalysts comprise one or more carrier materials selected from active carbon, kaolin, diatomite, cement, silica sand and ceramic material; and one or more metal compounds selected from: hydroxides, oxides, carbonates and bicarbonates of alkali metals; hydroxides, oxides, carbonates and bicarbonates of alkaline earth metals; oxides of the Group IIIA metals; oxides of the Group IVA metals; and oxides, hydrates of oxides, sulfates and carbonates of the transition metals. |